Clock



FIG. 1 is a front elevational view of a clock showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom view thereof.

The rear of the clock, not shown, is flat and plain. 

The ornamental design for clock, as shown and described. 